The following is just wild speculation but, I predict that that 3G's will arrive on April 24th, because:
A - It's the last Saturday of April. The wi-fi only will be coming on the 1st Saturday
B - They said "Late April"
C - The Canadian's will be getting their iPads on April 24th, and they were orginally told that they would be coming in "Late April".
Again, just pure wild speculation, but hey who knows? Meanwhile, I'm reading all of the reviews, and I am going to go down to the Apple store and check out a wi-fi only.